Method and cooler for cooling hot particulate material
A thermal material, cooler technology, applied in the direction of heat exchanger type, direct contact heat exchanger, drying chamber/vessel, etc., can solve problems such as wear and tear
Inactive Publication Date: 2011-07-13
F L SMIDTH & CO AS
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Problems solved by technology
A disadvantage of this known cooler is that the valve arrangement is a mechanically movable part which can wear out relatively quickly when exposed to the expanding compressed air, thus risking operational problems
Method used
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[0014] exist figure 1 A cooler 1 can be seen installed as a direct extension from a rotary kiln 3 for the manufacture of cement clinker. The cooler 1 comprises an inlet port 4 and an outlet port 5 . The cooler shown also comprises a fixed grate bottom 11 for supporting the cement clinker, a fan 12 for injecting cooling gas upwards through the clinker via a chamber 13 and an inlet furnace not shown in more detail. slots in the grate 11, and a plurality of scraping elements 14 that can be moved back and forth in the longitudinal direction of the cooler by a drive mechanism not shown, thereby moving the clinker from the The inlet end of the cooler moves to its outlet end.
[0015] The cooler shown also includes an inlet grate 21 arranged at the inlet end 4 of the cooler, directly below the outlet end of the rotary kiln for receiving hot cement clinker 2 . The design features of the inlet grate are outside the scope of the present invention and may in principle be configured in...
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A description is provided of a method as well as a cooler (1) for cooling hot particulate material which has been subjected to heat treatment in an industrial kiln, such as a rotary kiln (3) for manufacturing cement clinker wherein the hot material from the kiln (3) is directed onto a grate (21) in a cooler (1) where cooling gases via at least one cooling gas duct (28) are directed through slots (20) in the grate for cooling the hot material and where compressed air can be injected into the material on the grate (21). The method as well as the cooler is characterized in that compressed air is injected into the cooling gas duct (28). It is hereby obtained that the compressed air which is injected into the cooling gas duct (28) will operate as a non-return valve which will ensure that compressed air is injected into the material on the grate (21). This is due to the fact that the mass flow inertia and the dynamic pressure of the compressed air being injected into the cooling gas duct (28) will prevent a backflow of the compressed air into the cooling gas duct (28). The blanking-off of the cooling gas duct (28) thus achieved will further prevent clinker dust from falling through the cooling gas duct.
Description
technical field [0001] The invention relates to a method for cooling hot granular material that has been thermally treated in an industrial kiln, such as a rotary kiln for the manufacture of cement clinker, wherein the hot material from said kiln is directed onto a grate in a cooler, wherein cooling gas is directed through slots in the grate via at least one cooling gas duct for cooling the hot material, and wherein compressed air can be injected into the material on the grate. The invention also relates to a cooler for carrying out the method. Background technique [0002] A cooler of the above-mentioned type is known from EP1774236, wherein compressed air from a separate system can be intermittently injected into the material on the grate to remove clogging formed by the clinker material and causing the Any lumps and so-called snowmen formations that reduce the efficiency of the coolers described above, and wherein the ducting of the cooling gas is blocked off by using su...
Claims
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IPC IPC(8): F27D15/02F27B7/38C04B7/47
CPCC04B7/47F27D15/0213F27B7/383F26B25/10F28C3/16
Inventor 亚历山大.弗拉维奥托克曼
Owner F L SMIDTH & CO AS